A Study of Venetoclax in Combination With Conventional Chemotherapy in Pediatric Patients With Acute Myeloid Leukemia

Inclusion Criteria: * Diagnosis of AML fulfilling the criteria of the WHO classification of myeloid neoplasms or \< 20% marrow myeloblasts and evidence of a clonal de novo AML genetic abnormality or myeloid sarcoma or primary myelodysplastic syndrome (MDS) with ≥ 10% blasts or a complete blood count with the presence of at least 1,000 blasts/μL (e.g., a WBC count ≥ 10,000/μL with ≥ 10% blasts or a WBC count ≥ 5,000/μL with ≥ 20% blasts * Age \> 28 days and \< 22 years * No prior therapy for this malignancy except for one dose of intrathecal therapy and hydroxyurea or low-dose cytarabine (≤ 200 mg/m\^2 per day for ≤ 7 days) * Female patients of childbearing potential must have a negative pregnancy test within 2 weeks prior to enrollment * Male and female participants of reproductive potential must agree to use an effective contraceptive method during the study and for 6 months after study treatment * Written informed consent from the patient and/or parent/legal guardian * Direct bilirubin ≤ 1.5 x institutional upper limit of normal Exclusion Criteria: * Patients with treatment-related AML, Down syndrome, acute promyelocytic leukemia, chronic myeloid leukemia in blast crisis, juvenile myelomonocytic leukemia, Fanconi anemia, Kostmann syndrome, Shwachman syndrome, or other bone marrow failure syndromes are not eligible * Uncontrolled systemic fungal, bacterial, or viral infection or significant concurrent disease that would compromise patient safety or compliance, study parti…